June 1971

Purchase To Read More

Digital Issue ?Read or download this issue’s articles online. *A printed copy of this issue is not included. $7.99

Print + Digital All Access Subscription ?Read or download this issue’s articles online. Plus, subscribe to get Print, Online and Tablet access to the next 12 new issues to be released as well as Online access to archives back to 1845. $99.00

Features

Fusion by Laser

Experiments indicate that energy-releasing fusion reactions can be initiated and to some extent controlled without a confining magnetic field by focusing a powerful laser pulse on a frozen pellet of fuel

By Arthur P. Fraas and Moshe J. Lubin

Eye Movements and Visual Perception

Recordings of the points inspected in the scanning of a picture and of the path the eyes follow in the inspection provide clues to the process whereby the brain perceives and recognizes objects

By David Noton and Lawrence Stark

Elastic Fibers in the Body

These fibers enable tissues such as skin, arteries and ligaments to stretch and rebound. Their two components have been separated, and their composition and mode of synthesis are being established

By Paul Bornstein and Russell Ross

The Structure of the Proton and the Neutron

The way ultrahigh-energy electrons are scattered by protons and neutrons suggests that these "elementary" nuclear particles have a complex internal structure consisting of pointlike entities

By Henry W. Kendall and Wolfgang K. H. Panofsky

Magnetic Bubbles

A magnetic material is divided into regions that are magnetized in different directions. These "domains" can be formed into small "bubbles" that can be utilized in a new kind of computer memory

By Andrew H. Bobeck and H. E. D. Scovil

Endemic Goiter

The disorder has a long record because its principal sign is so apparent. it is now a disease of the poor, because an unbalanced diet often cannot correct for a deficiency of iodine in the soil

By R. Bruce Gillie

An Early City in Iran

Tepe Yahya, midway between Mesopotamia and India, was a busy center of trade 5,500 years ago. An outpost of Mesopotamian urban culture, it played a key role in the spread of civilization from west to east

By C C. and Martha Lamberg-Karlovsky

The Social Order of Turkeys

The society of the wild turkeys that live in the semiarid grasslands of southeastern Texas is so rigidly stratified that most of the males never have an opportunity to mate

By Allen W. Stokes and C. Robert Watts

Departments

50 and 100 Years Ago: June 1971

Science and the Citizen: June 1971

Letters

Letters to the Editors, June 1971

Recommended

Books

Mathematical Recreation

Mathematical Games

Amateur Scientist

The Amateur Scientist

Departments

The Authors

Bibliography

Purchase To Read More

Digital Issue ?Read or download this issue’s articles online. *A printed copy of this issue is not included. $7.99

Print + Digital All Access Subscription ?Read or download this issue’s articles online. Plus, subscribe to get Print, Online and Tablet access to the next 12 new issues to be released as well as Online access to archives back to 1845. $99.00

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www.springernature.com/us). Scientific American maintains a strict policy of editorial independence in reporting developments in science to our readers.